Agile implementation succeeds when requirements engineering and UI/UX design work hand-in-hand, using shared artifacts to align intent and interface. Key artifacts span strategy to detail: User Journey Maps; Epics → Features → User Stories; wireframes, mockups, prototypes, and navigation flows; plus lightweight UML (notably activity diagrams) to clarify behavior. User Stories play a dual role—as concise requirement statements and as fully refined Sprint Backlog Items enriched with UI designs, model-based specs, and Gherkin acceptance criteria. Teams can stage work across sprints (spec/design → implementation, or add a pre-implementation test-automation sprint for BDD), gating progress with a pragmatic Definition of Ready and Definition of Done. A project-specific “Way of Working” document captures roles, cadence, ceremonies, quality criteria, and collaboration rules so the whole team stays synchronized and iterative delivery remains smooth.